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Nextcorner
| Posted on Thursday, July 16, 2009 - 09:50 am: |
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I have a 2003 XB9R, K&N filter, Jardine exhaust. I put about 15 holes in my inner airbox, took out my snorkel, and put some holes in the outer airbox cover (same spot that the newer XB outer airbox cover has). I noticed I have less power under 3250 rpm. Midrange seems to have a little improvement, and the top rpm range has improved enough to really notice. I just received my ecmspy cable today and will try it out after work. Do I need a bit more fuel on the low and mid rpm range? |
Firstfamily
| Posted on Thursday, July 16, 2009 - 10:00 am: |
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My buddy has an 06 XB12S with a drummer exhaust that we just drilled out the air box in yesterday. Said it made a huge difference in power. Your bike might be running a little lean if nothing has been adjusted and could cause the loss of power under 3250. I have heard that the combo of drilling the air box and a k&n filter can cause them to run lean. |
Nextcorner
| Posted on Thursday, July 16, 2009 - 10:08 am: |
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When adding fuel to my map, what is a good starting point as far as a percentage to add. Should I start with adding 2% of the current value to my low-end (my problem area where i have loss of power)? |
Midknyte
| Posted on Thursday, July 16, 2009 - 10:15 am: |
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I have heard that the combo of drilling the air box and a k&n filter can cause them to run lean. The filter alone will make it start to run lean. Have you taken it out and given the ecm a chance to recalibrate (running it [I think] at 3500 to 4500 rpm for about 10 or 15 minutes straight.)? |
Swordsman
| Posted on Thursday, July 16, 2009 - 10:17 am: |
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Next, I got the same thing when I did mine. Didn't notice at that particular rpm, but it would seriously bog down when starting off from a stop (mine's an '06, so there's probably some mapping differences between us, and I still run the stock filter). I added 2 or 3% to the lower rpm's at the <20% throttle range, and it definitely helped. Still not perfect, but better. I need to do a full blown datalog run to see if I can get it back to normal. ~SM (Message edited by Swordsman on July 16, 2009) |
Darthane
| Posted on Thursday, July 16, 2009 - 10:50 am: |
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Buy the newer cover - there is a cone molded into it to help direct airflow into the velocity stack (in addition to holes to allow more airflow into it). |
Nextcorner
| Posted on Thursday, July 16, 2009 - 11:05 am: |
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My goal is to get some more power without spending money. So far, $10 on my ecm cable. The new cover won't solve my problem. I am currently getting more air than I did without the holes. I should have close to the same airflow as the new box. I know that it has a better airFLOW pattern, but either way, I'm getting more air than I did before. |
Darthane
| Posted on Thursday, July 16, 2009 - 02:16 pm: |
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-=shrugs=- The new cover may not solve your problem, but it will make a difference. That little cone ain't there just because it looks good, and there's a reason they all have them now. In general, you can't get something for nothing, with bikes or anything else. |
Ourdee
| Posted on Thursday, July 16, 2009 - 05:06 pm: |
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Darthane, I think he's fixated on the problem right now. Later he will remember the cone when he wants some more power. Finding a flat spot always gets my attention. |
Glitch
| Posted on Thursday, July 16, 2009 - 06:16 pm: |
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Did you ride enough for the ECM to learn about the changes you've made? |
Nextcorner
| Posted on Thursday, July 16, 2009 - 07:05 pm: |
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Darthane, Understand your point. Just don't have extra money right now. Eventually I'll change over the airbox, but i'm trying to get some more without it. |
Wavex
| Posted on Friday, July 17, 2009 - 12:04 pm: |
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It always amazes me when ppl hack their airbox and think they'll improve performance and be able to fine tune the FI map just by using their butt dyno... imho you guys are crazy! Either leave it alone or spend the money to get a proper dyno shop to tune your bike for your setup! On a side note: http://farm4.static.flickr.com/3297/3617025832_ba2deb417b_b.jpg (Message edited by wavex on July 17, 2009) |
Iamarchangel
| Posted on Friday, July 17, 2009 - 03:56 pm: |
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Gotta agree with Wavex on this one. I have no problem with arguing with design and engineers, it's just that this is math. "They" stopped that calculations at a certain point for certain reasons. People really need to have a grasp of the formulas involved. Why 15 holes? 13 holes may have been the optimum and now you'll never know. |
Nextcorner
| Posted on Friday, July 17, 2009 - 05:03 pm: |
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So why do places like AmericanSportbike even make and obviously sell plenty of the open airbox conversion kits? Also, the outer airbox with huge CIA vents? |
Nextcorner
| Posted on Friday, July 17, 2009 - 05:05 pm: |
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Drilling holes is not too far off from having an 07 airbox. |
Metalstorm
| Posted on Friday, July 17, 2009 - 06:49 pm: |
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The open airbox kit has the inverted nipple as well. It really is that important Edit: The nipple doesn't change the amount of air the engine receives. It just changes the flow of the air which changes how the engine responds and the engine responds very, very well to it. (Message edited by Metalstorm on July 17, 2009) |
Nextcorner
| Posted on Friday, July 17, 2009 - 06:55 pm: |
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Just ordered it. $35 is pretty cheap. |
Teddagreek
| Posted on Friday, July 17, 2009 - 07:41 pm: |
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What was wrong with the Original design once you desnorkel/K&N it? You start pulling in all that hot air too once you switch to the newer air box... Some one had the original air box covered in a insulation, with the tank cover sandwiched over it? |
Metalstorm
| Posted on Friday, July 17, 2009 - 07:48 pm: |
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What was wrong with the Original design once you desnorkel/K&N it? 03-04 9s didn't come with the inverted nipple inner air box cover. They suffered from a stumble at a certain rpm. It was discovered that replacing it with one from a 12 which had the inverted nipple smoothed out the air delivery and pretty much eliminated said stumble. There was even a tiny little gain in hp. In 05 the 9's came stock with the inverted nipple cover. Upgrading a pre-05 9 to the 12 inner cover was/is arguably the best mod one could/can do. For $35, you get your money's worth. |
Teddagreek
| Posted on Friday, July 17, 2009 - 08:52 pm: |
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I know that part of the story.. My 05 came with the nipple but it was still swiss cheesed? I have a 08 air-box now and a 09 white tank cover.. The breather through the tank was such a well thought out Idea and you don't pull the hotter air.. |